---
title: "CVE-2026-89596: Linux Kernel forcedeth - Out of Bounds Read/Write"
description: "Linux kernel forcedeth driver contains an off-by-one vulnerability caused by incorrect loop boundary in saving/restoring non-PCI config space, letting attackers trigger out-of-bounds memory access during suspend/resume, exploit requires kernel module loaded and suspend/resume cycle."
url: https://panop.io/threat-heartbeat/CVE-2026-89596/
---

# CVE-2026-89596 Linux Kernel forcedeth - Out of Bounds Read/Write

Linux kernel forcedeth driver contains an off-by-one vulnerability caused by incorrect loop boundary in saving/restoring non-PCI config space, letting attackers trigger out-of-bounds memory access during suspend/resume, exploit requires kernel module loaded and suspend/resume cycle.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.18% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89596)

## Details

Type

Out of Bounds Read/Write

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Published

11 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for forcedeth off-by-one error.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89596](https://nvd.nist.gov/vuln/detail/CVE-2026-89596)
- [https://git.kernel.org/stable/c/effd589568b2c4399894a23000286210c60af6d7](https://git.kernel.org/stable/c/effd589568b2c4399894a23000286210c60af6d7)
- [https://git.kernel.org/stable/c/fc71c6c3d3e3bb17474dcd1162aea6783a452a64](https://git.kernel.org/stable/c/fc71c6c3d3e3bb17474dcd1162aea6783a452a64)
- [https://git.kernel.org/stable/c/0c3f4544ff3873594c8af1b907b4ac4e6d5ce005](https://git.kernel.org/stable/c/0c3f4544ff3873594c8af1b907b4ac4e6d5ce005)
- [https://git.kernel.org/stable/c/9379f8527ca60d92715c90b32f1b477de9ec32cb](https://git.kernel.org/stable/c/9379f8527ca60d92715c90b32f1b477de9ec32cb)
- [https://git.kernel.org/stable/c/9393f1d656a79693e0c123ff7bc7c5c0f708046d](https://git.kernel.org/stable/c/9393f1d656a79693e0c123ff7bc7c5c0f708046d)
- [https://git.kernel.org/stable/c/c4f196bfeedd71e56aba4b63bd8f919edb2f7056](https://git.kernel.org/stable/c/c4f196bfeedd71e56aba4b63bd8f919edb2f7056)
- [https://git.kernel.org/stable/c/702aa4a44c87026b97b1da5c5ca80e1fa8a9875a](https://git.kernel.org/stable/c/702aa4a44c87026b97b1da5c5ca80e1fa8a9875a)
- [https://git.kernel.org/stable/c/c4d5953582463f45e48b14ef9815e5fb636f7e1f](https://git.kernel.org/stable/c/c4d5953582463f45e48b14ef9815e5fb636f7e1f)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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